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/*
* Copyright 2009 Benjamin Otte
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Benjamin Otte not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Benjamin Otte makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* BENJAMIN OTTE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL BENJAMIN OTTE BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Benjamin Otte <otte@gnome.org>
*/
#include "cairo-test.h"
#include <pthread.h>
#define N_THREADS 8
#define WIDTH 64
#define HEIGHT 8
typedef struct {
cairo_surface_t *target;
cairo_surface_t *source;
int id;
} thread_data_t;
static void *
draw_thread (void *arg)
{
thread_data_t *thread_data = arg;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_matrix_t pattern_matrix = { 2, 0, 0, 2, 0, 0 };
cairo_t *cr;
int x, y;
cr = cairo_create (thread_data->target);
cairo_surface_destroy (thread_data->target);
pattern = cairo_pattern_create_for_surface (thread_data->source);
cairo_surface_destroy (thread_data->source);
cairo_pattern_set_extend (pattern, thread_data->id % 4);
cairo_pattern_set_filter (pattern, thread_data->id >= 4 ? CAIRO_FILTER_BILINEAR : CAIRO_FILTER_NEAREST);
cairo_pattern_set_matrix (pattern, &pattern_matrix);
for (y = 0; y < HEIGHT; y++) {
for (x = 0; x < WIDTH; x++) {
cairo_save (cr);
cairo_translate (cr, 4 * x + 1, 4 * y + 1);
cairo_rectangle (cr, 0, 0, 2, 2);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_restore (cr);
}
}
cairo_pattern_destroy (pattern);
surface = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
return surface;
}
static cairo_surface_t *
create_source (cairo_surface_t *similar)
{
cairo_surface_t *source;
cairo_t *cr;
double colors[4][3] = {
{ 0.75, 0, 0 },
{ 0, 0.75, 0 },
{ 0, 0, 0.75 },
{ 0.75, 0.75, 0 }
};
int i;
source = cairo_surface_create_similar (similar,
CAIRO_CONTENT_COLOR_ALPHA,
2, 2);
cr = cairo_create (source);
cairo_surface_destroy (source);
for (i = 0; i < 4; i++) {
cairo_set_source_rgb (cr, colors[i][0], colors[i][1], colors[i][2]);
cairo_rectangle (cr, i % 2, i / 2, 1, 1);
cairo_fill (cr);
}
source = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
return source;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
pthread_t threads[N_THREADS];
thread_data_t thread_data[N_THREADS];
cairo_test_status_t test_status = CAIRO_TEST_SUCCESS;
cairo_surface_t *source;
int i;
source = create_source (cairo_get_target (cr));
for (i = 0; i < N_THREADS; i++) {
thread_data[i].target = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
4 * WIDTH, 4 * HEIGHT);
thread_data[i].source = cairo_surface_reference (source);
thread_data[i].id = i;
if (pthread_create (&threads[i], NULL, draw_thread, &thread_data[i]) != 0) {
threads[i] = pthread_self (); /* to indicate error */
cairo_surface_destroy (thread_data[i].target);
cairo_surface_destroy (thread_data[i].source);
test_status = CAIRO_TEST_FAILURE;
break;
}
}
cairo_surface_destroy (source);
cairo_set_source_rgb (cr, 0.5, 0.5, 0.5);
cairo_paint (cr);
for (i = 0; i < N_THREADS; i++) {
void *surface;
if (pthread_equal (threads[i], pthread_self ()))
break;
if (pthread_join (threads[i], &surface) != 0) {
test_status = CAIRO_TEST_FAILURE;
break;
}
cairo_set_source_surface (cr, surface, 0, 0);
cairo_surface_destroy (surface);
cairo_paint (cr);
cairo_translate (cr, 0, 4 * HEIGHT);
}
return test_status;
}
CAIRO_TEST (pthread_same_source,
"Use the same source for drawing in different threads",
"threads", /* keywords */
NULL, /* requirements */
4 * WIDTH, 4 * HEIGHT * N_THREADS,
NULL, draw)
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